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E2129

Sigma-Aldrich

Evans Blue

Dye content ≥75 %, Powder

Synonym(s):

Direct Blue 53

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About This Item

Empirical Formula (Hill Notation):
C34H24N6Na4O14S4
CAS Number:
314-13-6
Molecular Weight:
960.81
Colour Index Number:
23860
EC Number:
206-242-5
MDL number:
MFCD00004021
UNSPSC Code:
12171500
PubChem Substance ID:
24894456
NACRES:
NA.47

Product Name

Evans Blue, Dye content ≥75 %

form

powder

Quality Level

200

composition

Dye content, ≥75%

technique(s)

titration: suitable

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].[Na+].[Na+].[Na+].Cc1cc(ccc1\N=N\c2ccc3c(cc(c(N)c3c2O)S([O-])(=O)=O)S([O-])(=O)=O)-c4ccc(\N=N\c5ccc6c(cc(c(N)c6c5O)S([O-])(=O)=O)S([O-])(=O)=O)c(C)c4

InChI

1S/C34H28N6O14S4.4Na/c1-15-11-17(3-7-21(15)37-39-23-9-5-19-25(55(43,44)45)13-27(57(49,50)51)31(35)29(19)33(23)41)18-4-8-22(16(2)12-18)38-40-24-10-6-20-26(56(46,47)48)14-28(58(52,53)54)32(36)30(20)34(24)42;;;;/h3-14,41-42H,35-36H2,1-2H3,(H,43,44,45)(H,46,47,48)(H,49,50,51)(H,52,53,54);;;;/q;4*+1/p-4/b39-37+,40-38+;;;;

InChI key

ATNOAWAQFYGAOY-GPTZEZBUSA-J

Gene Information

human ... PTPN1(5770) , PTPRF(5792)

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General description

Evans blue (EB) C.I. 23860 is a synthetic bis-azo dye also known as T-1824 and Direct Blue 53. EB dye with higher water solubility has a strong affinity towards serum albumin, making it a high molecular weight protein tracer.

Application

Evans blue is a well-known vital stain with applications in histology and fluorescent microscopy. Evans blue has been used to check cell viability and study blood-brain barrier (BBB) permeability. Additional applications include the demonstration of specific pituitary cell types, selective staining of neutrophil plasma membranes, and fluorescence microscopy as a quenching agent to suppress unwanted autofluorescence.

Biochem/physiol Actions

Evans blue is a non-permeating dye. In presence of plasma membrane damage, the dye enters in the cytoplasm and nucleus, thereby staining them blue. Evans blue is used for checking cell viability. It is also used to study BBB (blood-brain barrier) permeability. The dye binds to albumin and hence indicates BBB breakdown to protein.

Pictograms

Health hazard
GHS08

Signal Word

Danger

Hazard Statements

H350

Hazard Classifications

Carc. 1B

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
SHBR6277
SHBQ4846
SHBP1253
SHBP6688
SHBN6470

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How should Product E2129, Evans Blue, be dissolved?

    This product is soluble in water, alcohol, acids and alkalies.

  4. What is the solution stability of Product E2129, Evans Blue?

    This product is rather stable in aqueous solution and may be autoclaved at 15 psi for 30 min. However, dye made up in physiological saline should not be autoclaved.

  5. What is the difference between Evans Blue Products E2129 and 206334?

    Both products are Evans Blue. Product No. E2129 has a dye content of 80% and Product No. 206334 has a dye content of approximately 85%.

  6. What is the shelf life of Product E2129, Evans Blue?

    This product has a retest date of 4 years.  This information can be found on the Certificate of Analysis.

  7. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  8. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  9. Can Evans Blue, Product E2129, be used as a counterstain for FITC?

    This product can be used as a counterstain in immunohistochemistry when using FITC. After staining for immunofluorescence, dip sections in a 0.1% (w/v) in water solution of Evans Blue for 5-10 minutes. Rinse well in fresh PBS or water before coverslipping. Reference: Immunocytochemistry, Theory and Practice, p. 82 (1988).

  10. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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